Beater-roll.



R. A. NORTH.

BEATER ROLL.

APPLICATION FILED JUNE 10. 1911.

Patented June 29, 1915.

2 SHEETS-SHEET l.

Patented June 29, 1915.

2 SHEETSSHE-ET 2.

R. A. NORTH.

BEATER ROLL.

APPLICATION FILED JUNE 10, 1912.

l mgmso WEED TATE PATENT @Flhllfifi.

MAY ADNA NORTH, OF BELOIT. WISCQNSIN, ASSIGNOB TO B. J. DOWI) KNIFE WORKS, 035 BELOIT, WISCONSIN, A CORPORATION.

BEATEEr-EOLL- nae-eases.

Application filed June 10, 1911.

To (ZZZ whom it may concern:

Be it known that l, RAY Anna NORTH, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented certain new and useful Improvements in Beater-Rolls, of which the following is a specification, reference being had to the accompanying draw ings.

This invention relatesto improvements in beater-rolls for beater-engines used in the manufacture of paper; and an object of my invention is to provide a beater-roll with a maximum of beating or abrasive surface at a minimum cost.

Another object of my invention is to provide a beater-roll which may be readily repaired and in which the beating members may be readily replaced by new ones, as those in use wear out.

A further object of my invention is to provide a beater-roll in which wear will increase the beating capacity of the abrading surfaces.

A fourth object of my invention is to rovide in a beater-roll beating members w ich may be readily applied to the beater-rolls now in common use.

Other objects of my invention will be alluded to in the description which hereinafter follows:

In the drawings illustrating the principle of my invention and the best mode now known to me of applying that principle, Figure 1 is a side elevation of so much of a beater-roll embodying my invention as is necessary to illustrate the latter; Fig. 2 is a plan of what is shown in Fig. 1; Fig. 3 is a detail in plan'of part of a section of my new beater-roll; and Fig. 4 is a perspective view.

of what is shown in Fig. 3.

In the beater-roll in common use to-day there projects from the cylindrical'surfa'ce of the roll the edges of the knife-bars or roll-bursa. betweenthe base portions of which are laid'blocks b of wood; and an end-ring c is provided at each end of the roll for the purpose of holding the roll-bars and the blocks of wood in assembled relation. Tothis old and well-known construction I have added beating members in the form of filling consisting of plates of wood and steel, the plates (1 of wood alternating with or bein sandwiched between the plates of steel e. i pair of fly bars or roll-bars a specification of Letters Eatent.

the ordinary use of the roll.

Fatented June 29, 1 315.

Serial 330. 832,520.

and the filling-plates d, e constitute a section and these bars and plates are held in assembled relation by means of tap-bolts 7" and nuts 9. Between successive sections an axially-extending channel 2' is left in order to make provision for the circulatory flow of the stock which is being beaten. A space It is left between the bottom of each section and the block b beneath it to afford clearance for the swelling of the wooden plates of the filling. These wooden plates wear away more rapidly, of course, than do the steel plates and the edges of the latter are left exposed and in position to operate most effectively in drawing out the fiber of the stock. Other material than Wood and iron may be used; the essential point is that one material should be more wear-resisting than the other, in order that the sharp edges of the harder material may become exposed in It is to be observed that my improvemeiit may readily and at nominal cost be embodied in the beater-roll as manufactured and used for the past quarter of a century. The paper manufacturers present installation or equip ment or plant is not thrown into the scrapheap as worthless but may be made use of and the initial or first cost of installing my improvement is thus made small. The roll bars a occupy exactly the same position as in these old beater-rolls; it is only necessary to assemble the filling-plates and the roll-bars and fasten them to ether. Thereby the abrasive surface of t e beater-roll is increased many times. It is true that this increase of beating-surface is obtained at the expense of space for the circulation of the paper-stock; but I have found that the axially-extending channels i left between the filled sections afford sufiicient space for the necessary circulation of the stock and that this diminution in space for such circulation does not detract from the efiiciency of the beater-roll and that a beater-roll embodying my hereinbefore-described improvementis many times more eflicient than that of the old beater-roll referred to. x

In the manufacture of paper, it is most desirable to separate the material of the rags (or other paper stock) into its component fibers without severing the fibers themselves, to the end that these fibers may be of great length in the manufactured product (paper), imparting great strength to the same. To

draw out the fibers now requires much time, lessens the capacity of the mill as measured by the weight of its product per week and adds greatly to the cost of production, although adding to the quality of the product. By increasing the surface presented to the stock for beating the same, I am enabled to reduce the time required to draw out completely the fibers and thereby to reduce the cost of produetion, while enhancing the quality of the product. Further, this result is accomplished with a relatively small increase in the cost of the beater-roll; and my improvement may readily be applied to the ordinary form of beater-roll, whereby the initial or first cost of the installation of my improved device is made small. Again, as the parts become worn out, they may be readily re placed without having to replace any part except that made inelficient by wear. In case a member becomes broken, repairs are easily effected. It is obvious that the magnitude of the heating surface may be varied by simply varying the number of filled sections used, removing or adding to the number of such, sections as the exigencies of the particular case may require.

In describing the materials used in mak jng the slabs c, it was stated hereinbefore that steel plates are sandwiched between wooden plates; but it is obvious that my object may be accom lished by the use of other -materials of di erent wearing qualities. The main point sought to be attained in this regard is the maintenance ofa roughened beating face on the filling by'reason of the unequal wear of the plates composing the same and the resulting exposure of-the outer axially-extending edge-portions of the more wear-resisting plates. I have found that it is generally preferable to give the latter a thickness less than the thickness of the fly-bars a (Fig. 4).

The roughened faces of my filling d, 8 does not chop up the fiber of the stock but preserves the fiber in all its length and is, therefore, better adapted for the purpose had in view in the beating operation than are the old roll-bars now in such common use without such filling.

I claim: a

I. A beater-roll having a plurality of spaced pairs of fly-bars projecting from its beating face and forming ockets between them; a retaining device or holding said lly-bars against radial displacement; and a paper-stock beater-filling mounted in some of the pockets between said fiy-bars and consisting of alternately-arranged plates of unequal wearing qualities; the outer exposed axially-extending edges of certain of said plates projecting only slightly beyond the corresponding edges of the others of said plates and forming therewith a paper-stock beating-surface; the other pockets between said fly-bars being open at their ends-and devoid of beater-filling and thereby adapted for the free circulation of the stock which is being beaten. 7

2. A beater roll comprising an annular series of radial fly bars spaced apart forming radial pockets between them, abrasive filling located in each alternate radial pocket, each filling consisting of materials having different degrees of hardness placed side by side in alternate relation to each other, and fastening means passing transversely through each set of filling strips and the fly bars which constitute the walls of the pocket in which the same may be inserted.

3. A beater roll comprising an annular series of radiating fly bars, spaced apagt forming radial pockets between them, a plurality of independent thin strips differing alternately in degrees of hardness and eonstituting an abrasive filling removably disposed in alternate radial pockets of the roll, and means for securing each filling in place in its pocket.

4-. A beater roll comprising a plurality of radial fly bals spaced apart forming an annular series of radial pockets, sets of alternate strips of metal and wood disposed side by side with the edges of the metal strips projecting slightly beyond the edges of the wooden strips, each set of said alternate metal and wooden strips constituting an abrasive filling, said fillings disposed in alternate radial pockets of the roll, and fastening means passing transversely through the respective walls of each of such alternate pockets and through the interposed filling stri s.

Signed at the borough of Manhattan, New

York city, this seventh day of J nne, 1911, in I the presence of the two undersigned witnesses.

r RAY ADN A NORTH.

Witnesses:

- JAMES HAMILTON, E. I. MCCARTHY. 

